Nano-fretting

Nano-fretting is an accelerated reciprocating wear test, which allows oscillation of sample whilst applying a known load. It differs from conventional wear testing (carried out using the nano-scratch and wear module) as follows:

  1. It uses a large radius spherical probe, giving low contact pressures
  2. It is a high cycle test, with up to 1 million cycles in one experiment
  3. It uses very small amplitude oscillations, allowing reproduction of true-fretting (partial slip) to nano-wear (full slip).

The user can vary both the frequency and amplitude of sample oscillation.

The extremely low thermal drift experienced by the NanoTest allows long duration wear tests such as these to be carried out with no need for drift corrections.

Figure 1

Fig 1: Fretting Scar. Applied load 200mN, total of 72000 cycles. A 150 μm radius sapphire probe was used, moving with 2μm amplitude.

Figure 2

Fig 2: 10mN load accelerated wear. Test comprised 216,000 cycles. A 150 μm radius sapphire probe was moved over a 14 μm amplitude

Support Literature

fretting flyer

Technical Notes

Our support literature for Nanofretting testing will provide a great introduction to the NanoTest Vantage, learn how you could be taking advantage.

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